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Question

An electromagnet is based on the heating effect of current.


A
True
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B
False
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Solution

The correct option is B False
  1. An electromagnet works on the principle of the magnetic effect of current because its magnetism disappears when the current is switched off.
  2. An electromagnet is a temporary magnet.
  3. When an electric current is allowed to pass through it, one end behaves like a north pole and the other end like a south pole.
  4. Polarity of the ends depends on the direction of the current.

Hence, the given statement is false.


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